Cycloalkanecarboxamides

ABSTRACT

COMPOUNDS OF FORMUALAE XI AND XII (BOTH IN CIS AND TRANS FORMS)   (-CH(-N(-R3)-R4)-CH2-(CH2)N-CH2-)&gt;CH-CO-N(-R1)-R2 (XI)   (-CH(-N(-R3)-R4)-CH2-(CH2)N-CH2-)&gt;CH-CH2-N(-R1)-R2 (XII)   WHEREIN N IS A NUMBER OF 1 TO 3, INCLUSIVE; R1 IS HYDROGEN, ALKYL OF 1 TO 6 CARBON ATOMS, INCLUSIVE, OR CYCLOALKYL OF 5 TO 7 CARBON ATOMS, INCLUSIVE; R2 IS ALKYL OR CYCLOALKYL DEFINED AS ABOVE, OR TOGETHER   -N(-R1)-R2   IS A HETEROCYCLIC-AMINO GROUP; AND R3 AND R4 ARE ALKYL OR TOGETHER   -N(-R3)-R4   IS A HETEROCYCLIC-AMINO GROUP, ARE PREPARED, THE COMPOUNDS AND THE PHARMACOLOGICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF HAVE VARIOUS PHARMACOLOGICAL ACTIVITIES, E.G., HYPOGLCEMIC, SEDATIVE, AND ANTI-INFLAMMATORY ACTIVITIES AND CAN BE USED IN MAMMALS AND BIRDS TO PRODUCE A LOWERING OF BLOOD SUGAR, TO TRANQUILIZE OR TO REDUCE INFLAMMATORY OR ARTHRITIC CONDITIONS.

United States Patent US. Cl. zen-293.63 Claims iABSTliACT- OF THE DISCLOSURE Compounds of Formulae XI and XII (both in cis and trans forms) wherein n is a number of 1 to 3, inclusive; R is hydrogen, alkyl ot l to 6 carbon atoms, inclusive, or cycloalkyl of 5 to? carbon atoms, inclusive; R is alkyl or cycloalkyl defined as above, or together is a heterocyclic-amino group; and R and R are alkyl or together. 1

is a heterocyclic-amino group, are prepared. The compounds and. the pharmacologically acceptable acid addition salts thereof have various pharmacological activities, e.g., 'hypoglyeemicgsedative', and anti-inflammatory activities and can be used in mammals and birds to produce a lowering of blood sugar, to tranquilize or to reduce inflammatory'jor arthritic conditions.

This application is a continuation-in-part of application 'Ser. No. 848,089, filed Aug. 6, 1969.

BACKGROUND OF THE INVENTION Field of the invention .{Ihis invention relates to new organic compounds and is particularly concerned with 'cycloalkaneaminoamidesf cycloalkanediarnines, and the pharmacologically acceptable acid vaddition salts thereof; intermediates therefor, and the processes. of production therefor.

' siiMlviji w oF THE INVENTION I Thenovel compoundsand the processes of invention canbe illustratively represented by'the following two sequences of formulae":

3,647,804 Patented Mar. 7, 1972 "X i l 1 wherein" it is a number of 1 to 3, inclusive; is siel ected from the group consisting of methyl and ethyl; R is selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms, inclusive, and cycloalkyl of to 7 carbon atoms, inclusive; R is selected from the group consisting of alkyl and cycloalkyl defined as above, or wherein together 2 is a heterocyclicamino radical selected from the group consisting of pyrrolidino, piperidino, methyl-substituted piperidino, morpholino, 4-methyl-piperazino and hexamethyleneimino; and wherein R and R are alkyl, defined as above, or together is a heterocyclicamino group, defined as above.

The preferred amide compounds (of Formula XI) are those in which n is 2 and therefore have the specific Formula XIa:

is selected from the group consisting of dialkylamino in which the alkyl group is of l to 6 carbon atoms, inclusive, pyrrolidino, piperidino, methylpiperidino and hexamethyleneimino, and wherein 4 alkeneamine (VIII) to give the unsaturated amide (IX) which by catalytic hydrogenation gives the corresponding cis-N-[(Z-aminocycloalkyl)carbonyl1amine (X). The latter (by isomerization with potassium t-butoxide if desired), followed by reduction with a metal hydride or diborane, gives a diamine of Formula XII.

DESCRIPTION OF THE PREFERRED EMBODIMENT The invention includes the acid addition salts, particularly the pharmacologically acceptable acid addition salts, of compounds XI (cis form compound IV; trans form compound V) and compounds XII (cis form compound VI; trans form VII).

Illustrative acid addition salts include the hydrochlorides, hydrobromides, hydroiodides, sulfates, acetates, propionates, laurates, lactates, tartrates, citrates, maleates, malates, phenylacetates, methanesulfonates, benzenesulfonates, toluenesulfonates, cyclohexanesulfamates and the like.

Illustrative examples of alkyl groups having from 1 to 6 carbon atoms are methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tertiary butyl, pentyl, Z-methylbutyl, neopentyl, hexyl, Z-methylpentyl, S-methylpentyl and the like.

Examples of the cycloalkyl radical of 5 to 7 carbon atoms, inclusive, illustratively represented by the formula are cyclopentyl, cyclohexyl and cycloheptyl.

The novel compounds of Formula XII have hypoglycemic activity and can be used to lower the blood sugar level in mammals and birds by oral administration. The same applies to a number of the compounds of Formula XI.

The following test procedure was carried out to show the depression of blood sugar in rats: Intact male rats were fasted from 18 to 24 hours, and an oral dose of the new compound to be tested (here 25 and 100 mgkg.) was administered in 0.5 ml. of a vehicle containing in each milliliter 5 mg. carboxymethylcellulose, 4 mg. polysorbate 80, 9 mg. sodium chloride and 9 mg. benzyl alcohol, the balance being water. Each rat was then injected subcutaneously with 125 mg. of glucose in 0.9% saline. The rats were bled two hours later via vena cava and the blood sugar determined. The control rats were fed the above vehicle without the drug. The average change of blood sugar in percent between the control animal and the test animal is reported in Table I.

TABLE 1.-ORAL ANTIDIABETIC ACTIVITY Change of blood sugar from control Dosage. percent (test Compound mg./kg. compound) Cis-1-[2-(piperdlnomethyl)cyclohexyllplperidine dil1ydrochl01ide..-. :28 Tolbutamlde (trademark Orinase") 25 39. 7 Cls-1-[2-(hexamethyleneimlnocyclohexyl) carbonyl] hexamethylenelmine hydrochloride :22 Tolbnrmnida 25 29.8 Cls-N-[2-(plperldinocyclohexyl)carbonyHdiethylamlne hydrochloride 33 :3: Tolbutami 25 -32. 8 Ols-1-[2-[(cyolohexylamino)methyl1cyclohexyl1piperidine dlhydroclllorideuu; 3 1 Tolbutamlde 25 --28: 3

the corresponding cis-N-[(Z-aminocycloalkyl)carbonyl] amine (IV). Compound (IV) is converted to the transisomer (V) by treatment with potassium t-butoxide. Reducing compound (IV) or (V) with a metal hydride or diborane gives the corresponding cis- (VI) or trans- (VII) N-[Z-(aminomethyl)cycloalkyl]amine.

Method B of this invention comprises: Heating an isocyanate of the formula Q=C==NR with a l-cyclo- Other Formula XI compounds having hypoglycemic activity include cis-l- Z-piperidinocyclohexyl) carbonyl] piperidine free base (activity of 0.6 relative to tolbutamide) and hydrochloride (0.5 x tolbutamide); cis-l- [[2 (l-pyrrolidinyl)cyclohexyl]carbonyl]piperidine hydrochloride (0.5 x tolbutamide); cis 4 [(Z-piperidiriocyclohexyl)carbonyl]morpholine hydrochloride (0.25 x tolbutamide); and cis 1 [[2-( l-pyrrolidinyDcyclohexyHcarbonyl] pyrrolidine free base (0.27 x tolbutamide) and the hydrochloride (0.25 x tolbutamide).

A unit dosage of -100 mg./kg., taken 2 to 4 times daily, is used to lower bloodsugar.

A number of the compounds of Formula XI also have oral anti-inflammatory activity and are thus useful in the treatment of inflammatory, e.g., arthritic conditions, of mammals and birds at a dosage approximately equal to that of aspirin. The anti-inflammatory actvity was measured by the hind paw assay in which one hind paw of each test and control rat is injected with a phlogistic agent (carrageen), the test rat after having been primed with the t test anti-inflammatory agent. The weight of the amputated right and left hind paws are used to calculate the relative suppression of inflammation [see details by M. Glenn et al., J. Pharm. Exptl. Therapeutics, 155, 157 (1967)].

Table .II below gives the anti-inflammatory activity relative to aspirin.

, ,TABLE II Y Anti-inflammatory activity (x aspirin) Aspirin 1.0 Cis l [[2 (l-pyrrolidinyl)cyclohexyl]carbonyl] pyrrolidine hydrochloride Cis 4 [(2 morpholinocyclohexyl)-carbonyl]morp-holine 1.5 Cis 4 [(2 morpholinocyclohexyl)-carbonyl]morpholine hydrochloride 1.6 Cis 4 1 [(2 piperidinocyclopentyl)carbonyl]piperi- ,dine 1.0 Cis 4 [(2 piperidinocyclohexyl)-carbonyl)morpholine 1.0 Cis 4 [(2 piperidinocyclohexyl)-carbonyl]morpholine hydrochloride 1.8 Cis- 4 [[2 (l-pyrrolidinyl)cyclohexy1]carbonyl] morpholine 1.2 Cis 4 [[2 (l-pyrrolidinyl)cyclohexyl] carbonyl] morpholine hydrochloride 0.92

. Cis 1 [(2 morpholinocyclohexyl)carbonyl]piperidine hydrochloride shows anticonvulsive, tranquilizing and sedative activities at 100-200 mg./ kg. body weight in mice as evidenced by the chimney, dish and pedestal tests and nicotine antagonism.

For oral-administration the active compounds can be administered in liquid or solid dosage forms. Solid forms include capsules, tablets, powders, pills, and the like, and liquid forms include suitably flavored aqueous suspensions and solutions (depending on concentration desired), and flavored oil suspensions and solutions wherein edible oils, e.g., corn, oil, cottonseed oil, coconut oil, peanut oil, sesame oil, or mixtures of these, and the like can be employed.

:For preparing compositions such as tablets and other compressed formulations the compositions can include any compatible and edible tableting material used in pharmaceutical practice, e.g., corn starch, lactose, stearic acid, magnesium stearate, talc, methyl cellulose, and the like. .Similarly, the compounds of the present invention can be mixed with suitable adjuvantsfor the preparation of resortable hard gelatin or soft capsules utilizing conventional pharmaceuticalpractices.

'As noted above, the new compounds, of Formulae XI and XII can be used in the form of pharmacologically acceptable acid addition salts with inorganic or organic acids, for example, as hydrochlorides, hydrobromides, sulfates, hydroiodies, phosphates, citrates, lactates, tartrates, salicylates, cyclohexanesulfamates, pamoates, and the like. The acid addition salts canbe' prepared in conventional manner, forex'ample by reacting the selected acid with theselected free amine of Formula XI or XII preferably in an aqueous or non-aqueous solvent such as water, ether, methanol, ethanol, ethyl acetate or the like. Evaporation of the solvent provides the desired acid addition salt.

The novel compounds are also useful on account of their utility in the non-pharmaceutical field. For example, the fluosilicates of compounds of Formulae XI or XII are useful as mothproofing agents. The thiocyanates of the same compounds can be condensed with formaldehyde to form resinous polymers which are useful as pickling inhibitors. The trichloroacetates of the same compounds are useful as herbicides, for example, against Johnson grass, yellow foxtail, green foxtail, Bermuda grass and quack grass.

In carrying out the process of this invention by the Method A, a lower alkyl ester of a 2-oxocycloalkanecarboxylic acid (I) is heated with an equimolar amount of an amine of formula HNR R If this amine is a gas or low boiling liquid, the reaction is carried out in an inert organic agent such as benzene, toluene, carbon tetrachloride, tetrahydrofuran or the like. The reaction time is between 1 to 48 hours and the reaction is usually carried out at about the reflux temperature of the mixture. After termination of the reaction, the thus obtained 2-oxocycloalkanecarboxamide (II) is separated and purified by conventional procedures such as by distillation in vacuo, recrystallization, chromatography or the like.

The thus obtained 2-oxocycloalkanecarboxamide (II) is thereupon reacted with a selected secondary amine in benzene solution in the presence of an acid catalyst, preferably p-toluenesulfonic acid. In this reaction Water separates and provision should be made for the separation of water from the reaction mixture, e.g., an azeotropic separator, or substances capable of absorbing water such as calcium sulfate, magnesium silicate and other anhydrous inorganic salts capable of forming hydrates. The reaction time is usually between 1 and 48 hours at the reflux temperature of the mixture. Inert solvents such as toluene, benzene, tetrahydrofuran, ether as well as methyl alcohol (anhydrous) can be used. At the end of the reaction the resulting enamine (III) is isolated only in the crude stage by removing excess amine and solvent, generally by distillation in vacuo.

The thus-obtained crude material is then catalytically hydrogenated in the presence of a platinum catalyst and an inert solvent, e.g., ethanol, methanol or the like. In the preferred embodiment of this reaction, platinum oxide reduced at a hydrogen pressure of 10-80 pounds is used. The platinum oxide is used in a ratio of 1 part by weight of PtO to 200-1000 'parts by Weight of the reaction mixture. The hydrogenation is generally carried out for 6 to 72 hours whereafter the reaction mixture is filtered to remove the catalyst and evaporated to give the desired product, a cis N [(Z-aminocycloalkyl)carbonyl]amine (IV), which can be purified in conventional manner such as crystallization, chromatography or the like.

This cis compound of Formula IV can be converted to the corresponding trans compound (V) by heating and refluxing a mixture of potassium tert.-butoxide in tert.- butyl alcohol with the selected cis compound (IV). In the preferred embodiment of this invention, compound IV is heated with 1 to V of a mole of potassium tert.-butoxide per mole of compound IV in tert.-butyl alcohol for a period of 6 to 48 hours. After the reaction is terminated, the mixture is cooled, diluted with excess water and the resulting product extracted with a water-immiscible organic solvent such as methylene chloride, chloroform, carbon tetrachloride, ether or the like. Evaporation of the extract and recrystallization of the resulting residue provides the isomeric trans compound of Formula V.

The amides of Formulae IV and V are converted to the diamines of Formulae VI and VII, respectively, by reduction with a metal hydride or diborane. Metal hydrides useful for this reduction include lithium aluminum hydride, aluminum hydride and magnesium aluminum hydride, with lithium aluminum hydride preferred. The reduction is carried out in conventional manner, usually by adding the compound of Formula IV and V in solution to a suspension of the metal hydride or a solution of diborane. Inert solvents for this reaction include dioxane, tetrahydrofuran, ether, dibutyl ether, benzene or the like. The same solvents may be used to keep the lithium aluminum hydride in suspension. Diborane is usually used in tetrahydrofuran solution. After the addition of the compound of Formula IV or V is completed, the mixture is generally kept at reflux for 1 to 24 hours, then cooled and decomposed with water, thereafter with aqueous sodium or potassium hydroxide or the like when employing lithium aluminum hydride; or decomposed with hydrochloric acid when employing diborane. After filtration of the mixture and evaporation of the solvent, the product is obtained in its crude form which can be purified by standard procedures such as recrystallization, chromatography, or the like. The thus-obtained diamines of Formulae VI and VII can be converted into salts by the addition of an acid in stoichiometric proportions, in an aqueous or non-aqueous medium as noted above.

In carrying out the process of this invention according to Method B, an isocyanate of the Formula O=@NR in which R is defined as before, in an organic solvent, is added to a l-cycloalkeneamine of Formula VIII. In the preferred embodiment of this reaction the isocyanate is added in solution such as benzene, toluene, ether or the like to the enamine (VIII) also in solution, under conditions of reflux. After all of the isocyanate solution has been added, the mixture is refluxed from 6 to 48 hours, the solvent is removed by distillation and the resulting residue is dissolved in benzene or ethanol and hydrogenated catalytically to provide a compound of Formula X, i.e., a compound of Formula IV in which R is hydrogen. The product thus obtained can be isolated and purified as shown before. A transform of this product can be made by treatment with potassium tert.-butoxide to give a com pound of Formula V in which R is hydrogen. Each of the compounds of Formulae IV and V in which R is hydrogen can be converted to the corresponding diamine (VI and VII) by reduction with a metal hydride or diborane as discussed before.

The following examples are illustrative of the process and the products of the present invention, but are not to be construed as limiting.

EXAMPLE 1 1-[ (2-oxocyclohexyl carbonyl] piperidine A mixture of ethyl and methyl 2-oxocyclohexanecarboxylates (85 g.; about 0.50 mole) and piperidine (43 g.; 0.50 mole) was heated at reflux for 17.5 hours. After cooling, the low boiling constituents were removed on a rotary evaporator and the residue was vacuum distilled to afford:

Boiling point Weight, grains Fraction:

1 6065 C./0.05 mm. 31. II 128130 C./0.05 mm. 52 (50% yield).

Cis-1-[ (2-piperidinocyclohexyl carbonyl] piperidine and its hydrochloride A mixture of 1-[(2-oxocyclohexyl)carbonyl]piperidine (16 g.; 0.075 mole), piperidine (20 g.), benzene (125 ml.), and p-toluenesulfonic acid (0.5 g.) was refluxed for 22 hours using an azeotropic separator. The solvent and excess piperidine were removed on a rotary evaporator.

The residue was dissolved in 200 ml. of absolute ethanol and hydrogenated for 48 hours in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solvent was removed on a rotary evaporator. The residue was dissolved in 0.5 1. of ether, washed with two -ml. portions of water and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator and the residue was recrystallized from hexane to give 13.8 g. (66%) of cis-1-[(2-piperidinocyclohexyl)carbonyl]piperidine of melting point 84.586.5 C.

Analysis.-Calcd. for C17H30N2O (percent): C, 73.30; H, 10.89; N, 10.06. Found (percent): C, 72.98; H, 10.85; N, 10.04.

Cis-1-[ 2-piperidinocyclohexyl) carbonyl] piperidine hydrochloride was prepared by treating an ether solution of the free base with ethereal hydrogen chloride and was recrystallized from ethanol-ether; melting point 220- 221 C.

Analysis.-Calcd. for C17H30N2OHcl (percent): C, 64.80; H, 9.94; N, 8.90; CI, 11.28. Found (percent): C, 64.80; H, 10.01; N, 8.69; Cl, 11.14.

EXAMPLE 3 Cis-1-[ (2-morpholinocyclohexyl carbonyl] piperidine hydrochloride A mixture of 10.45 g. (0.050 mole) of l-[(2-oxocyclohexyl)carbonyl]piperidine, 4.35 g. (0.050 mole) of morpholine, ml. of benzene and 0.5 g. of p-toluenesulfonic acid was refluxed for 4 days using an azeotropic separator. The solvent was removed on a rotary evaporator and the residue was dissolved in absolute ethanol (200 ml.) and hydrogenated in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solvent was removed on a rotary evaporator. The residue was dissolved in ether (0.5 1.), washed with water (two 50-ml. portions), and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator and the residue was converted into the hydrochloride in ether solution with ethereal hydrogen chloride and recrystallized from ethanol-ether to give 8.6 g. (54%) of cis-1-[(2-morpholinocyclohexyl)car-bonyl1piperidine hydrochloride of melting point -196 C.

Analysis.-Calcd. for C H N O -HCl (percent): C, 60.63; H, 9.22; N, 8.84; Cl, 11.21. Found (percent): C, 60.64; H, 8.90; N, 8.55; Cl, 11.18.

EXAMPLE 4 Cis-1[ [2-( l-pyrrolidinyl cyclohexyl] carbonyl] piperidine hydrochloride A mixture of 10.45 g. (0.050 mole) of 1-[(2-oxocyclohexyl)carbonyl]piperidine, pyrrolidine (3.55 g.; 0.050 mole), benzene (125 ml.), and p-toluenesulfonic acid (0.5 g.) was refluxed for 10 hours using an azeotropic separator. The solvent and excess pyrrolidine were removed on a rotary evaporator and the residue was dissolved in absolute ethanol (200 ml.) and hydrogenated for 20 hours in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solvent was removed on a rotary evaporator. The resulting residue was dissolved in ether (0.5 1.), washed with water (two 50-ml. portions), and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator and the residue was converted into the hydrochloride in ether with ethereal hydrogen chloride and recrystallized from ethanol-ether to give 7.8 g. (51%) of cis-1-[[2-(1-pyrrolidinyl)cyclohexyl]carbonyl]piperidine hydrochloride of melting point 192193.5 C.

Analysis.Calcd. for C H N O-HCl (percent): C, 63.85; H, 9.71; N, 9.31; Cl, 11.81. Found (percent): C, 63.96; H, 9.88; N, 9.05; Cl, 11.80.

9 1 EXAMPLE 4- (2-oxocyclohex-y) carbonyl] morpholine Boiling point Weight, grams Fraction: 5

I 7075 C./0.05 mm. 30.

11 146-150? C./0.05 mm. 50 (48% yield).

Fraction II, the desired product, solidified shortly after distillation and was'recrystalli'zed from ether to give 4'- [(2- oxocyclohexyl)carbonyl]morpholine of melting point 79.581 C. 1 1

Analysis.Calcd. for C11H17NO3' (percent): C, 62.50; H, 8.14; N, 6.63. Found (percent): C, 62.33; H, 8.15; N, 6.56.

4 EXAMPLE 6 Cis-4- 2-morpholinocyclohexy carbonyl] morpholine and its hydrochloride A mixture of 10.5 g. (0.050 mole) of 4-[(2-oxocyclohexyl)carbonyl]morpholine, 4.35 g. (0.050 mole) of morpholine, benzene (150 ml.),"and p-toluenesulfonic acid (0.5 g.) was refluxed for 26 hours using an azeotropic separator. The solvent was removed on a rotary evaporator and the residue was dissolved in ethanol (200 ml.) and hydrogenatedfor 44 hours in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solvent was removed on a rotary evaporator. The residue was dissolved in ether (0.51.), washed with water (two 75-ml. portions), and driedover anhydrous magnesium sulfate- The solvent was removed on a rotary evaporator and the residue wasrecrystallized from ether to afford 4.0 g. (29%) of cis-4-[(2-morpholinocyclohexyl)carbonyl]morpholine of melting point 97.5-98.5 C.

Analysis.-Calcd. for C H N O (percent): C, 63.76; H, 9.32; N, 9.92. Found (percent): C, 63.40; H, 9.02; N, 10.12.

Cis 4-[2 morpholinocyclohexy)carbonyl]morpholine hydrochloride was prepared by treating an ether solution of the free base with ethereal hydrogen chloride and was recrystallized from ethanol-ether; melting point 226- 228 C.

Analysisl Calcd. for C H N O -HCl (percent): C, 56.46; H, 8.56; N, 8.78; Cl, 11.14. Found (percent): C, 56.42; H, 8.31; N,"8.85; Cl, 11.39".

EXAMPLE 7' Cis-4 1 [2-(1-py y v x r morpholine and its hydroc A mixture of 10.5 g. (0.050 mole) of 4-[(2-oxocyclohexyl)carbonyl]morpholine, pyrrolidine (3.55 g.; 0.050 mole), benzene (150 ml.), and p-toluenesulfonic acid (0.5 g.) wasr'efluxed for 24 hours using an azeotropic separator. The solvent was removed on a rotary evaporator and the residue was dissolved in ethanol (200 ml.) and hydrogenatedfor hours in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solventwas removed on arotary evaporator. The residue was dissolved in ether (0.5 1.), Washed -withwater (two 75-ml.-.portions), and dried over anhydrous magnesium sulfate; The solvent was removed on a rotaryevaporator and the residue was recrystallized from ether and then from hexane to give 6.3 g; (47%) of cis 4-[[2-(1-pyrrolidinyl)cyclohexyl]carbonyl]morpholine of melting point 66.5-.68 C.

Anaylsis.Calcd. for C H N O (percent): C, 67.59; H, 9.88; N, 10.51. Found (percent): C, 67.64; H, 9.94; N, 10.51.

Cis 4 [[2 (l-pyrrolidinyl)cyclohexyl]carbonyl]- morpholine hydrochloride was prepared by treating an ether solution of the free base with ethereal hydrogen chloride and was recrystallized from ethanol-ether; melting point 215216.5 C.

Ana'lysis.Calcd. for C H N O -HCl (percent): C, 59.45; H, 9.02; N, 9.25; CI, 11.72. Found (percent): C, 59.73; H, 9.13; N, 9.15; Cl, 11.67.

EXAMPLE 8 Cis-4- (Z-piperidinocyclohexyl carbonyl] morpholine and its hydrochloride A mixture of 10.5 g. (0.050 mole) of 4-[(2-oxocyclohexyl)carbonyl]morpholine, piperidine (4.25 g.; 0.050 mole), benzene (150 ml.), and p-toluenesulfonic acid (0.5 g.) was refluxed for 24 hours using an azeotropic separator. The solvent and excess piperidine were re moved on a rotary evaporator and the residue was dissolved in ethanol (200 ml.) and hydrogenated for 44 hours in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solvent was removed on a rotary evaporator. The residue was dissolved in ether (0.5 1.), washed with water (two 75-ml. portions), and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator and the residue was recrystallized from absolute ether to afford 7.5 g. (54%) of cis-4-[(2- piperidinocyclohexyl)carbonyllmorpholine of melting point 101102.5 C.

Analysis.Calcd. for C H N O (percent): C, 68.49; H, 10.09; N, 9.99. Found (percent): C, 68.56; H, 9.99; N, 10.10.

Cis-4-[(2 piperdinocyclohexyl)carbonyl]morpholine hydrochloride was prepared by treating an ether solution of the free base with ethereal hydrogren chloride and was recrystallized from \cthanol-ether; melting point 211- 213 C.

Analysis.-Calcd. for C H N O -HCl (percent): C, 60.61; H, 9.25; N, 8.84; Cl, 11.21. Found (percent): C, 60.36; H, 9.41; N, 8.73; Cl, 11.10.

EXAMPLE 9 1- (2-oxocylohexyl carbonyl] hexamethyleneimine A mixture of ethyl and methyl 2-oxocyclohexanecarboxylates g.; about 0.50 mole) and hexamethyleneimine (50 g.; 0.50 mole) was refluxed for 23 hours. The lower boiling components were removed on a rotary evaporator and the residue was vacuum distilled to give:

Boiling point Weight, grams Fraction:

I 60-78 C./0.05 mm. 30. II 139-141 C./0.05 mm. 78 (71% yield).

Cis- 1 (2-hexamethyleneiminocyclohexyl) carbonyl] hexamethyleneimine hydrochloride A mixture of 11.15 g. (0.050 mole) of 1-[(2-oxocyclohexyl carbonyl] hexamethyleneimine, hexamethyleneimine (10 g.; 0.10 mole), toluene ml.), and p-toluene sulfonic acid (0.5 g.) was refluxed for 3 hours using an azeotropic separator. The solvent and excess hexarnethyleneimine were removed on a rotary evaporator and the residue was dissolved in absolute ethanol (200 ml.) and hydrogenated for 18 hours in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solvent was removed on a rotary evaporator. The residue was converted into the hydrochloride in ether with ethereal hydrogen chloride and recrystallized from ethanol-ether to aflord 8.1 g. (48% yield) of cis-1-[(2-hexarnethyleneiminocyclohexyl)carbonyl]hexamethyleneimine hydrochloride of melting point 191-1925 C.

Analysis.Calcd. for C H N O-HCl (percent): C, 66.51; H, 10.30; N, 8.17; Cl, 10.36. Found (percent): C, 66.05; H, 10.33; N, 8.11; Cl, 10.47.

EXAMPLE 1 l 1[ (2-oxocyclohexyl) carbonyl] pyrrolidine A mixture of ethyl and methyl 2-oxocyclohexanecarboxylates (37.5 g.; about 0.22 mole) and pyrrolidine (15.5 g.; 0.22 mole) was heated at reflux for 40 hours. The lower boiling constituents were removed on a rotary evaporator and the residue was vacuum distilled to give:

Boiling point Weight, grams Fraction:

I 6570 C./0.05 mm. 15. II 125-130 C./0.05 mm. 29 (58% yield).

Cis-1-[ [2- l-pyrrolidinyl) cyclohexyl] carbonyl] pyrrolidine and its hydrochloride A mixture of 9.75 g. (0.050 mole) of 1-[(2-oxocyclohexyl)carbonyl]pyrrolidine, pyrrolidine (3.55 g.; 0.050 mole) benzene (150 ml.), and p-toluenesulfonic acid (0.5 g.) was refluxed for 24 hours using an azeotropic separator. The solvent and excess pyrrolidine were removed on a rotary evaporator and the residue was dissolved in ethanol (200 ml.) and hydrogenated for 20 hours in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solvent was removed on a rotary evaporator. The residue was dissolved in ether (0.5 1.), washed with water (two 75-m1. portions), and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator and the residue was recrystallized from hexane to give 5.9 g. (47%) of cis-1-[[2-(1-pyrrolidinyl) cyclohexyl] carbonyl] pyrrolidine of melting point Analysis.-Calcd. for C H N O (percent): C, 71.91; H, 10.51; N, 11.19. Found (percent): C, 72.16; H, 10.50; N, 11.43.

Cis l [[2-(l-pyrrolidinyl)cyclohexyl]carbonyl]pyrrolidine hydrochloride was prepared from the free base in ether with ethereal hydrogen chloride and was recrystallized from ethanol-ether; melting point 223.5225 C Analysis.Calcd. for C H N O-HCI (percent): C, 62.76; H, 9.52; N, 9.76; Cl, 12.38. Found (percent): C, 63.17; H, 9.51; N, 9.86; CI, 12.32.

EXAMPLE 13 N- (2-oxocyclohexyl carbonyl] diethylamine A mixture of ethyl and methyl 2-oxocyclohexanecarboxylates (85 g.; about 0.50 mole) and diethylamine (37 g.; 0.50 mole) was refluxed for 14 days. The lower boiling constituents were removed on a rotary evaporator and the residue was vacuum distilled to afford:

Analysis.-Calcd. for C H NO (percent): C, 67.02; H, 9.69; N, 7.10. Found (percent): C, 67.24; H, 9.90; N, 7.02.

EXAMPLE 14 Cis-N- (2-piperidinocyclohexyl) carbonyl] diethylamine hydrochloride A mixture of 9.85 g. (0.050 mole) of N-[(2-oxocyclohexyl)-carbonyl]diethylamine, piperidine (5.1 g.; 0.060 mole), benzene 150 ml.), and p-toluenesulfonic acid (0.5 g.) was refluxed for3 days using an azeotropic separator. The solvent and excess piperidine were removed on a rotary evaporator and the residue was dissolved in absolute ethanol (200 ml.) and hydrogenated for 18 hours in the presence of platinum catalyst (0.5 g. PtO at an initial pressure of 50 p.s.i. The catalyst was removed by filtration and the solvent was removed on a rotary evaporator. The residue was dissolved in ether (300 ml.) and extracted with dilute hydrochloric acid (two -m1. portions). The combined extracts were made basic with sodium hydroxide solution and extracted with ether (two ZOO-ml. portions). The combined extracts were washed with water ,(two 50-rnl. portions) and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator and the residue was converted into the hydrochloride in ether with ethereal hydrogen chloride and recrystallized once from ethanolether and twice from carbon tetrachloride to give 4.7 g. (46%) of cis-N[(2-piperidinocyclohexyl)-carbonyl]diethylamine hydrochloride of melting point l91l93 C.

AnalysisF-Calcd. for C H N O-HCl (percent): C, 63.43; H, 10.31; N, 9.25; Cl, 11.73. Found (percent): C, 63.57; H, 10.34; N, 9.27; CI, 12.25.

EXAMPLE 15 1- (2-oxocyclopentyl) carbonyl] piperidine A mixture of ethyl and methyl 2-oxocyclopentanecarboxylates (31.2 g.; about 0.20 mole) and piperidine (18.7 g.; 0.22 mole) was heated at reflux for 72 hours. The lower boiling components were removed on a rotary evaporator and the residue was vacuum distilled to afford:

Boiling point Weight, grams Fraction:

I 60-120 C./0.05 mm. 3.1. II 124-126 C./0.05 mm. 21 (54% yield).

Fraction II was 1 [,(2 oxocyclopentyl)carbonyl] piperidine.

Analysis.-Calcd. for C11H17NO2 (percent): C, 67.62; H, 8.81; N, 7.17. Found (percent): C, 67.79; H, 8.74; N, 6.98.

EXAMPLE 16 Cis-1-[ (2-piperidinocyclopentyl) carbonyl] piperidine 13 rator. The residue was dissolved in ether (400 ml.), washed with water (50 ml.), and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator and the residue was recrystallized from hexane to afford 8.2 g. (62%,) of cis-l-[(2-piperidinocyclopentyl) carbonyl] piperidine of melting point 86-875 C.

Anqlysis.Ca lcd. for C H N O .(percent): C, 72.64; H, 10.71; N, 10.59. Found (percent): C, 72.35; H, 10.94; N, 10.64. 7

EXAMPLE 17 l-[ (2-oxocycloheptyl carbonyl] piperidine In the manner given in Example 1, a mixture of ethyl 2-oxocycloheptanecarboxylate and piperidine was heated to reflux to give 1-[( 2-oxocycloheptyl) carbonyl]piperidine.

7 EXAMPLE 18 Cis-1-[ (2-piperidinocycloheptyl) carbonyl] piperidine "In'the manner given in Example 2, 1-[(2-oxocycloheptyl)carbonyl]piperidine' was reacted with piperidine in the'pre'sence of p-toluenesulfonic acid and the resulting enarnine was catalytically hydrogenated (PtO and hydrogen) to give cis 1-[(2-piperidinocycloheptyl)carbonyl] piperidine.

EXAMPLE 19 1- 2-oxocycloheptyl carbonyl] hexamethyleneimine In the manner given in Example 1, a mixture of ethyl 2-oxocycloheptanecarboxylate and hexamethyleneimine was heated to r'eflux'to give 1[ (2-oxocycloheptyl)carbonyl]hexamethyleneimine. t

EXAMPLE 20 Cis-1-[ (Z-morpholinocycloheptyl carbonyl] hexamethyleneimine In the manner given in Example 2, l-[(2-oxocycloheptyl)carbonyl]hexamethyleneimine was reacted with morpholine in the presence of p-toluenesulfonic acid and the resulting enamine was hydrogenated in the presence of a platinum catalyst to give cis-1-[(2-morpholinocycloheptyl carbonyl] hexamethyleneimine.

EXAMPLE 21 1-[ (2-oxocycloheptyl carbonyl] -4-methylpiperazine EXAMPLE 23 .1 (Z-oxoeyclohexyl carbonyl] -3 -methylpiperidine In the-manner given in Example 1, a mixture of ethyl "2-oxocyclohexanecarboxylate and 3-methylpiperidine was heated-1th reflux to give 1- (2-oxocyclohexyl) carbonyl] 3'-methylpi peridine. 7 EXAMPLE 24 Cis-1-. [2'(2-methylpiperidino cyclohexyl] carbonyl] -3- 1 -rnethylpiperidine In thejjfn'anneri given in Example 2, l-[(2-oxocyclohexyDCar bo'nylJ-3 methylpiperidine was reacted with 2- :methylpiperidine in the presence of p-toluenesulfonic acid res lti g enaniine was hydrogenated in thepresence of a platinum catalyst to give cis-l-[[2-(2-rnethylpiperidino) cyclohexyl] carbonyl] -3-methylpiperidine.

EXAMPLE 25 l-[ (2-oxocyclopentyl) carbonyl] hexamethyleneimine In the manner given in Example 1, a mixture of ethyl 2-oxocyclopentanecarboxylate and hexamethyleneimine was heated to reflux to give 1-[(2-oxocyclopentyl)carbonyl] hexamethyleneimine.

EXAMPLE 26 Cis-1-[ (2-dimethylaminocyclopentyl) carbonyl] -hexamethyleneimine In the manner given in Example 2, l-[(2-oxocyclopentyl)carbonyl]hexamethyleneimine was reacted with dimethylaniine in benzene in the presence of p-toluenesulfonic acid and the resulting enamine was hydrogenated in the presence of a platinum catalyst to give cis-1[(2-dimethylaminocyclopentyl carbonyl] hexamethyleneimine.

In the manner given in Example 1, other alkyl 2-oxocycloalkanecarboxylates can be reacted with heterocyclic amines, such as pyrrolidine, piperidine, 2-, 3- and 4-methylpiperidine, hexamethyleneimine, morpholine, N-methylpiperazine or the like to give the corresponding 2-ox0cycloalkanecarboxamide (II). These compounds II can be treated with secondary amines and hydrogenated with a catalyst to give cis N [(2 aminocycloalkyl)carbonyl] amines (IV). Representative compounds (IV), thus obtained, include:

cis-4-[ [2- (4methylpiperazin0 cyclohexyl] carbonyl] morpholine cis-1-[ (2-dihexylaminocyclohexyl) carbonyl] -4-methylpiperazine;

cis-1-[ (2-dipentylaminocyclohexyl) carbonyl] pyrrolidine;

cisl-[ (2-diisopropylaminocyclohexyl) carbonyl] piperidine;

cis- 1- (2-methylpentylaminocyclohexyl) carbonyl] hexa methyleneimine;

cis-4- (2-dibutylaminocyclopentyl)carbonyl1morpholine;

cisl- (2-diethylaminocyclopentyl) carbonyl] -4- methylpiperazine;

cisl- (2-dimethy1aminocyclopentyl carbonyl] -4- methylpiperidine;

cis-1-[ [2- Z-methylpiperidino cyclopentyl] carbonyl] -4- methylpiperazine;

cisl- 2-hexamethyleneiminocyclopentyl carbonyl] -4- methylpiperazine;

cis- 1- (2-diisobutylaminocycloheptyl carbonyl] -3-methylpiperidine;

cislt- (2-dipropylaminocycloheptyl) carbonyl] morphoine;

cis-1-[ (2-dimethylaminocycloheptyl) carbonyl] -4- methylpiperazine;

cis-1-[ [2- (3-methylpiperidino cycloheptyl] carbonyl] -4 methylpiperazine;

cis-1 (2-pyrrolidinocycloheptyl) carbonyl] -4-methylpiperidine;

and the like.

EXAMPLE 27 Cis-N-cyclohexyl-2-piperidinocyclohexanecarboxamide and its hydrochloride A solution of 42 g. (0.33 mole) of 'cyclohexyl iso cyanate in dry benzene (200 ml.) was added dropwise to a stirred, refluxing solution'of l piperidino-l-cyclo hexene (55 g.; 0.33 mole')in benzene (200 1111.). The solution was'refluxed for 17 hours and the solvent was removed on a rotary evaporator. The residuewas dissolved in thiophene-free benzene (400 ml.) and hydrogenated for 3 /2 hours in the presence of platinum catalyst (1.0 g. PtO at an initial pressure of ,50 p.s.i. The catalyst was removed by filtration and the filtrate was extracted with dilute hydrochloric acid (two 300-ml. portions). The, combined extracts were made basic with aqueous sodium hydroxide solution and then extracted with methylene chloride (three O-ml. portions). The combined extracts Were made basic with aqueous sodium hydroxide solution and then extracted with methylene chloride (three 250-rnl. portions). The combined organic extracts were washed with water (100 ml.) and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator and the residue was recrystallized from hexane to give 64 g. (66% of cis-N-cyclohexyl-Z-piperidinocyclohexanecarboxamide.

A -g. portion of this base was converted into the hydrochloride in ether and recrystallized from ethanolether to yield 24 g. of cis-N-cyclohexyl-Z-piperidinocyclohexanecarboxamide hydrochloride of melting point 229- 230 C.

Analysis.-Calcd. for C H N O-HCl (percent): C, 65.71; H, 10.10; N, 8.52; Cl, 10.80. Found (percent): C, 65.66; H, 9.97; N, 8.64; Cl, 10.95.

EXAMPLE 28 Cis-N-butyl-Z-piperidinocyclohexanecarboxamide In the manner given in Example 27, butyl isocyanate and l-piperidino-l-cyclohexene were heated together and the resulting product was hydrogenated in the presence of a platinum catalyst to give cis-N-butyl-Z-piperidinocyclohexanecarboxamide.

EXAMPLE 29 Cis-N-hexyl-2-morpholinocyclohexanecarboxamide In the manner given in Example 27, hexyl isocyanate and l-morpholino-l-cyclohexene were heated together and the resulting product was hydrogenated in the presence of a platinum catalyst to give cis-N-hexyl-2-morpholinocyclohexanecarboxamide.

EXAMPLE 3'0 Cis-N-cyclopentyl-2-hexamethyleneiminocyclopentanecarboxamide In the manner given in Example 27, cyclopentyl isocyanate and l-hexamethyleneimino-l-cyclopentene were heated together and the resulting product was hydrogenated in the presence of a platinum catalyst to give cis-N- cyclopentyl 2 hexamethyleneiminocyclopentanecarboxamide.

EXAMPLE 31 Cis-N-isobutyl-Z- (4-methylpiperazino cycloheptanecarboxamide In the manner given in Example 27, isobutyl isocyanate and 1-(4-methylpiperazino)-1-cycloheptene were heated together and the resulting product was hydrogenated in the presence of a platinum catalyst to give cis-N-isobutyl- 2-(4-methylpiperazino) cycloheptanecarboxamide.

EXAMPLE 32 Cis-N-cycloheptyl-Z-pyrrolidinocyclohexanecarboxamide In the manner given in Example 27, cycloheptyl isocyanate and l-pyrrolidino-l-cyclohexene were heated together and the resulting product was hydrogenated in the presence of a platinum catalyst to give cis-N-cycloheptyl- 2-pyrrolidinocyclohexanecarboxamide.

In the manner given in Example 27, other products of Formula XI in which R is hydrogen can be produced by reacting an enamine VIII with an isocyanate of formula O=C=N-R and catalytically hydrogenating the product. Representative compounds, thus obtained, include:

cis-N-methyl-2-piperidinocyclohexanecarboxamide;

cis-N-ethyl-Z-pyrrolidinocyclopentanecarboxamide;

cis N-isopropyl-Z-pyrrolidinocyclopentanecarboxamide;

cis-N-butyl-2-morpholinocycloheptanecarboxamide;

cis-N-isobu'tyl-2-(4-methylpiperazino)cycloheptanecarboxamide;

cis-N-pentyl-2- (4-methylpiperazino cyclohexanecarboxamide;

cis-N-propyl-2-hexamethyleneiminocyclopentanecarboxamide;

cis-N-hexyl- (Z-methylpiperidino) cycloheptanecarboxamide;

cis-N-cyclopentyl-2 (3 -methylpiperidino) cycloheptanecarboxamide;

cis-N-(2,2-dimethylbutyl)-2-pyrrolidinocycloheptanecarboxamide;

and the like.

EXAMPLE 33 Trans-N-cyclohexyl-Z-piperidinocyclohexane carboxamide A solution of cis-N-cyclohexyl-2-piperidinocyclohexanecarboxamide (0.35 mole), potassium tert butoxide (0.04 mole) and 125 ml. of tert.butyl alcohol was refluxed for 24 hours. The mixture was cooled, diluted with 500 ml. of water and extracted with three ZOO-m1. portions of methylene chloride. The combined extracts were washed with ml. of water, dried over anhydrous magnesium sulfate and evaporated (on a rotary evaporator) to give a residue. This residue Was recrystallized from hexane to give trans-N-cyclohexyl-Z-piperidinocyclohexanecarboxamide.

In the same manner given in Example 33, other ciscompounds of Formula XI are converted to trans compounds by treatment with potassium tert.butoxide. Representative compounds, thus prepared, include:

trans-l- (2-piperidinocyclohexyl) carbonynpiperidine;

trans- 1- (2-morpholino) cyclohexyl] carbonyl] piperidine;

trans-1-[ [2-( l-pyrrolidinyl) cyclohexyl] carbonyl] piperidine;

trans-4- (2-morpholinocyclohexyl) carbonyl] morpholine;

trans-4- [2-( l-pyrrolidinyl) cyclohexyl] carbonyl] morpholine;

trans-4- 2-piperidinocyclohexyl) carbonyl] morpholine trans-1-[ (2-hexamethyleneiminocyclohexyl) carbonyl] hexamethylene-imine;

trans- 1- [2- l-pyrrolidinyl) cyclohexyl] carbonyl] pyrrolidine;

trans-N-[ 2-piperidinocyclohexyl) carbonyl] diethylamine;

trans-1-[ Z-piperidinocyclopentyl) carbonyl] piperidine;

trans-'1-[ [2-( l-pyrrolidinyl) cyclopentyl] carbonyl] pyrrolidine; v

trans-N-methyl-Z-piperidinocyclohexanecarboxamide trans-N-ethyl-2-pyrro1idinocyclopentanecarboxamide;

trans-N- 2,2-dimethylbuty1) -2-pyrrolidinocycloheptanecarb oxamide and the like.

EXAMPLE 34 Cis-1-[2-[ (cyclohexylamino methyl] cyclohexyl] piperidine and its dihydrochloride A solution of cis-N-cyclohexyl-2-piperidinocyclohexanecarboxamide (8.0 g.; 0.0274 mole) in dioxane (200 ml.) was added dropwise to a stirred suspension of lithium aluminum hydride 8.0 g.) in dioxane (300 ml.). After the addition was completed the mixture was heated on a steam-bath with stirring for 16 hours. The mixture was cooled 10 C.) and treated dropwise with the following: (1) water (8 ml.); (2) 15% aqueous sodium hydroxide solution (8 ml.); (3) water (24 ml.). The precipitate was removed by filtration and washed with dioxane. The filtrate was dried over anhydrous magnesium sulfate and the solvent was removed on a rotary evaporator. The residue was converted into the dihydrochloride in ether and recrystallized from absolute ethanol 17 (800 ml.) to give 6.1 g. (65%) of cis-1-[2-[(cyclohexylamino) methyl] cyclohexyl] piperidine dihydrochloride of melting point 321322 C.

Analysis.-Calcd. for C H H -2HCl (percent): C, 61.49; H, 10.33; N, 7.93; Cl, 20.21. Found (percent): C, 61.04; H, 10.35; N, 7.73; Cl, 19.98.

The dihydrochloride in water solution was treated with aqueous sodium hydroxide, the mixture extracted with methylene chloride and the methylene chloride solution evaporated to give the free base, cis-1-[2-[(cyclohexylamino) methyl] cyclohexyl] piperidine.

EXAMPLE 35 Cis- 1- [2- (piperidinomethyl )cyclohexyl] piperidine dihydrochloride A solution of cis-'1-[(2-piperidinocyclohexyl)carbonyl] piperidine (1.1 g.; 0.040 mole) in anhydrous ether (150 ml.) was added dropwise to a cooled suspension of lithium aluminum hydride (6.7 g.; 0.176 mole) in ether (300 ml.). The solution was stirred for 20 hours at room temperature, cooled, and treated dropwise with the following: (1) water (14 ml.); (2) 20% aqueous sodium carbonate solution (5.0 ml.); (3) water (24 ml.). The resulting precipitate was removed by filtration and washed several times with ether. The combined organic portions were washed with water (50 ml.) and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator. The residue was submitted to partial vacuum distillation (bath 120 C. at 0.1 mm.) to remove the lower boiling impurities. The dihydrochloride of the pot residue was prepared in ether with ethereal hydrogen chloride and recrystallized from ethanol-ether to give 3.0 g. of hydrated cis-1-[2-(piperidinomethyl)cyclohexylJpiperidine dihydrochloride of melting point 229'230.5 C.

, Analysis.--Calcd. for C H N -2HCl-2/3H O (percent): C, 58.40; H, 10.11; N, 8.01; Cl, 20.33. Found (percent): C, 5824; H, 10.22; N, 7.92; Cl, 20.10.

Heating the hydrate for 72 hours at '10 mm. Hg pressure in a dessicator, gave the water-free cis-l-[2-piperidinomethyl) cyclohexyl] piperidine dihydrochloride.

EXAMPLE 36 Cis- 1- [2- pip eridinomethyl cyclopcntyl] piperidine and its dihydrochloride A solution of cis-1-[(2-piperidinocyclopentyl)carbonyl]piperidine (8.5 g.; 0.032 mole) in anhydrous ether (125 ml.) was added dropwise to a cooled suspension of lithium aluminum hydride (6.7 g.; 0.176 mole) in ether (300 ml.). The solution was stirred for 18 hours at room temperature, cooled, and treated dropwise with (1) water (14 ml.); (2) 20% aqueous sodium carbonate solution (5.0 ml.); (3) water (24 ml.). The precipitate was removed by filtration and washed with ether (two 100- ml. portions). The combined organic portions were washed with water (50 ml.) and dried over anhydrous magnesium sulfate. The solvent was removed on a rotary evaporator to give cis-1[2 (piperidinomethyl)cyclopentyl]piperidine as a colorless oil. The dihydrochloride was prepared in ether with etheral hydrogen chloride and recrystallized from ethanol-ether to give g. (94%) of cis-1-[2 (piperidinomethyl)cyclopentyl]piperidine dihydrochloride of melting point 264.5265.5 C.

Analysis.--Calcd. for C H N -2HCl (percent): C, 59.42; H, 9.97; N, 8.68; Cl, 21.92. Found (percent): C, 59.16; H, 10.00; N, 8.36; Cl, 21.75.

EXAMPLE 37 Cis-l- [2- (morpholinomethyl cyclohexyl1piperidine dihydrochloride In the manner given in Example 34, cis-1-[(2-rnorpholinocyclohexyl)carbonyl]piperidine was reduced with lithium aluminum hydride and the resulting product reacted with an ethereal solution of hydrogen chloride to 18 give cis-l [2-(morpholinomethyl)cyclohexyl1piperidine dihydrochloride.

EXAMPLE 38 Cis-1-[2- l-pyrrolidinyl methyl] cyclohexyl] piperidine dihydrochloride In the manner given in Example 34, cis-[[2-(1-pyrrolidinyl)cyclohexyl]carbonyl]piperidine Was reduced with lithium aluminum hydride and the resulting product reacted with an ethereal solution of hydrogen chloride 10 give cis-l [2 [(1-pyrrolidinyl)methyl1cyclohexyl1piperidine dihydrochloride.

EXAMPLE 39 Cis-4- [2-(morpholinomethyl)cycloxyl]morpholine dihydrochloride In the manner given in Example 34, cis-4-[(2-morpholinocyclohexyl)carbonyl1morpholine was reduced with lithium aluminum hydride and the resulting product reacted with an ethereal solution of hydrogen chloride to give cis-4- [2- (morpholinomethyl cyclohexyl] morpholine dihydrochloride.

EXAMPLE 40 Cis- 1- [2- (hexamethyleneiminomethyl) cyclohexyl] hexamethyleneimine dihydrochloride In the manner given in Example 34, cis-1-[(2-hexamethyleneiminocyclohexyl) carbonyl] hexamethyleneimine was reduced with lithium aluminum hydride and the resulting product reacted with an ethereal solution of hydrogen chloride to give cis-l [2-(hexamethyleneiminomethyl)cyclohexyl]hexamethyleneimine dihydrochloride.

EXAMPLE 41 Cis-1-[2- l-pyrrolidinyl methyl] cyclohexyl1pyrrolidine dihydrochloride In the manner given in Example 34, cis-l-[[2-(1-pyrrolidinyl)cyclohexyl]carbonyl]pyrrolidine was reduced with lithium aluminum hydride and the resulting product reacted with an ethereal solution of hydrogen chloride to give cis-1-[2- l-pyrrolidinyl) methyl] cyclohexyl1pyrrolidine dihydrochloride.

EXAMPLE 42 Trans- 1- [2- cyclohexylamino methyl]cyclohexyl] piperidine dihydrochloride In the manner given in Example 34, trans-N-cyclohexyl- 2-piperidinocyclohexanecarboxamide was reduced with lithium aluminum hydride and the resulting product reacted with an ethereal solution of hydrogen chloride to give trans-1 [2-[(cyclohexylamino)methyl]cyclohexyl] piperidine dihydrochloride.

In the manner given in Example 34, other aminoamides of Formula XI can be reduced with a metal hydride and the reduced product can be treated with hydrogen chloride to give the corresponding diamine polyhydrochlorides of the compounds of Formula XII. Representative compounds, thus obtained, include:

cis-l- 2- (morpholinomethyl) cycloheptyl1piperidine dihydrochloride;

cis- 1- [2- (diethylamino) methyl] cyclohexyl1piperidine dihydrochloride;

cis- 1 [2- (piperidinomethyl cyclopentyl] piperidine dihydrochloride;

cis-l- [2-(piperidinomethyl) cycloheptyl1piperidine dihydrochloride;

cis-l- [Z-(morpholinomethyl cycloheptyl1hexamethylenemine dihydrochloride;

cisl [2- (morpholinomethyl) cycloheptyl] -4-methylpiperazine trihydrochloride;

cisl- [2- Z-methylpiperidino methyl] cyclohexyl] -3- methylpiperidine dihydrochloride;

cis- 1- [2- (dimethylamino) methyl] cyc1opentyl]hexamethyleneimine dihydrochloride;

trans-l [2-[ 1-pyrrolidinyl methyl] cyclohexyl] piperidine dihydrochloride;

trans- 1- [2- (piperidinomethyl) cyclopentyl piperidine dihydrochloride;

trans- 1- 2- l-pyrrolidinyl) methyl] cyclohexyl] pyrrolidine dihydrchloride;

trans- 1- [2- l-pyrrolidinyl) methyl] cyclopentyl] pyrrolid'me dihydro chloride; and the like.

Treating the above hydrochlorides with aqueous sodium hydroxide, extracting with an organic solvent, e.g., ether, benzene, methylene chloride, chloroform or the like, and evaporating the solvent gives the free bases.

The free bases by treatment with stoichiometric amounts of other acids, e.g., hydrogen bromide, hydrogen iodide, sulfuric, chloric, perchloric, acetic, propionic, butyric, trichloroacetic, benzoic, phenylacetic, 3-phenylpropionic, benzenesulfonic, p-toluenesulfonic, methanesulfonic, cyclohexanesulfamic, lactic, citric, maleic, malic, tartaric acids or the like provides other salts of the compounds of Formula XII.

What is claimed is:

1. A compound of the formula wherein n is a number of 1 to 3 inclusive; wherein is selected from the group consisting of dialkylamino in which the alkyl group is of 1 to 6 carbon atoms, inclusive, pyrrolidino, piperidino, methylpiperidino, and hexamethyleneimino, and wherein is selected from the group consisting of pyrrolidino, piperidino, and methylpiperidino, and hexamethyleneimino.

2. A cis compound according to claim 1 wherein R R N/ l 3 and N\ are piperidino and the compound is therefore cis-l-[(2- pi peridinocyclohexyl carbonyl] piperidine.

3. The hydrochloride of the compound of claim 2, namely cis-1 [2-piperidinocyclohexyl)carbonyl]piperidine hydrochloride.

4. A cis compound according to claim 1 as a hydrochloride, wherein R and R are ethyl and is piperidino and the compound is therefore cis-N-[(2- piperidinocyclohexyl) carbonyl] diethylamine hydrochloride.

5. A cis compound according to claim 1 of Formula XI, wherein n is 1,

U.S. Cl. X.R.

260-239 B, 239 BF, 247.2 A, 247.5 R, 247.7 H, 268 R, 268 C, 268 H, 293.52, 293.65, 293.69, 293.71, 326.3, 326.5 E, 326.81, 326.85, 468 R, 557 IR, 563 R; 424-248, 250, 267, 274, 320, 325

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION 5, 7, Dated March 7, 1972 Patent No.

Inventor(s) Ronald H. Rynbrandt and Louis L. Skaletzky It is certified that error appears in the.above- -identified patent and that said Letters Patent are hereby corrected as shown below:

Column 4, l i ne 42, for 100 mg. kg. read 100 mg./l g. Column 5, l i ne 56, For "compos i tions read composition l H 62, for "resortable" read resorbable Column 6, line 54, for as crystal l ization read as by crystal l ization Colur 7, line 1, for "IV and V" read IV or V Column 9, line 5, for oxocyclohexy" read oxocyclohexyl l i ne 25, for "morpholinocyclohexy" read morphol inocyclohexyl l ine 4.6, H l- [2" read l- (2- l ine #6, For "morphol i ncyc lohexy" read morpholinocyclohexyl Column 11, line 66, for "C H N O'HC| read C H N2O-HCl Column 16., line'5, for hexyl- (2" read hexyl -2- (2- Column 17, l l ns 17, For (1.1 g. read (11.1 g. line 10, for "-ci s-1-[2-" read cls-1-[2( Column 29, line 11 for "cls-1-[2" read cl s-1-[ (2- Signed and sealed this 25th day of July 1972.

(SEAL) Attest:

EDwARD MJLETCHERJR. ROBERT GUTTSCHALK Attesting Officer Commissioner of Patents USCOMM-DC 60376-P6! a u.s. GOVERNMENT PRINTING OFFICE: I959 o-ass-a:

FORM PO-lOSO (10459) 

